“They definitely dampen the volume & have their place, but don't expect to get the same feel or response from your heads as you would without them. So, not great for beginners learning stick feel & drum tone. BUT ok for learning a groove till you've worked it out & then playing it with them off.
The beauty being that you can just lift them off & chuck them back on when you need to keep the volume down so you don't upset the neighbours, sleeping babies & shift workers.”